Practice Pointers

$$Complete the following diagrams and code

so that they all correspond to each other:

void someFunction$()\{$

int i $=$

int j $=44$;

int $*$p$1=$ &

int $*$p$2$; $//$at addr $0$xFC$0100$EC

$$What is p$1$s value?

$$Write the code to display p$1$s pointee$$s value.

$$Write the code to display p$1$s value.

$$Is it useful to know a pointer$$s exact value?

$$What is p$2$s value?

Basic Diag:

$22$

i

p$1$

j

p$2$

$$Write the code to initialize p$2$ so that it points to nothing.

$$What happens if the code below executes when p$2$ is NULL?

printf$("\%$i

$",*$p$2)$;

Linear Diag:

$0$xFC$0100$F$8$

$0$xFC$0100$F$0$

$$What happens if the code below executes when p$2$ is uninitialized?

printf$("\%$i

$",*$p$2)$;

$$Write the code to make p$2$ point to i$.$

$$How many pointer variables are declared in the code below?

void someFunction$()\{$

int$*$ p$1,$ p$2$;

$$What does the code below do$?$

int $**$q $=$ &p$1$;

$00$

$00$

$00$

$16$

$00$

$00$

$00$

$2$C

FC

$01$

$00$

F$4$

$?$

$?$

$?$